use `std::os::unix::fs::fchown`

[Jorge Aparicio]

instead of the unsafe libc::fchown. this API will be stabilized in Rust 1.73 (~ 2023-10-05)

sudo-rs/src/system/file/chown.rs

Line 16 in 9b9a7e4

 cerr(unsafe { libc::fchown(fd, owner, group) }).map(|_| ()) 

[Ruben Nijveld]

I would suggest we only do this once our MSRV increases past this version some time in the future, and not increase our MSRV just because of this feature.

[Marc R. Schoolderman]

Maybe we can introduce some labels for issues that have to wait only because of a MSRV-related issue?

[Christian Poveda Ruiz]

@squell maybe we could do milestones for these so we can actually track the specific version for each issue, what do you think?